The parametric equations x=t+2 and y=+²+ 3t represent a plane curve. Which of the following rectangular equations represents the plane t curve?

Trigonometry (11th Edition)
11th Edition
ISBN:9780134217437
Author:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Chapter1: Trigonometric Functions
Section: Chapter Questions
Problem 1RE: 1. Give the measures of the complement and the supplement of an angle measuring 35°.
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**Problem: Parametric Equations to Rectangular Equation**

The parametric equations \( x = t + 2 \) and \( y = t^2 + 3 \) represent a plane curve. Which of the following rectangular equations represents the plane curve?

In this problem, we aim to find the rectangular (Cartesian) equation that corresponds to the given parametric equations. 

**Solution:**

1. Start by solving the parametric equation \( x = t + 2 \) for the parameter \( t \):
   \[
   t = x - 2
   \]

2. Substitute this expression for \( t \) into the second parametric equation \( y = t^2 + 3 \):
   \[
   y = (x - 2)^2 + 3
   \]

This equation, \( y = (x - 2)^2 + 3 \), is the rectangular equation representing the plane curve described by the given parametric equations.

**Discussion:**

This process involves algebraically manipulating the parametric equations to eliminate the parameter \( t \), resulting in an equation that relates \( x \) and \( y \) directly. This rectangular (or Cartesian) form is often more convenient for graphing and understanding the overall shape of the curve.
Transcribed Image Text:**Problem: Parametric Equations to Rectangular Equation** The parametric equations \( x = t + 2 \) and \( y = t^2 + 3 \) represent a plane curve. Which of the following rectangular equations represents the plane curve? In this problem, we aim to find the rectangular (Cartesian) equation that corresponds to the given parametric equations. **Solution:** 1. Start by solving the parametric equation \( x = t + 2 \) for the parameter \( t \): \[ t = x - 2 \] 2. Substitute this expression for \( t \) into the second parametric equation \( y = t^2 + 3 \): \[ y = (x - 2)^2 + 3 \] This equation, \( y = (x - 2)^2 + 3 \), is the rectangular equation representing the plane curve described by the given parametric equations. **Discussion:** This process involves algebraically manipulating the parametric equations to eliminate the parameter \( t \), resulting in an equation that relates \( x \) and \( y \) directly. This rectangular (or Cartesian) form is often more convenient for graphing and understanding the overall shape of the curve.
### Quadratic Equations

Below are a set of quadratic equations labeled from 'a' to 'd'. These equations are of the form \( y = ax^2 + bx + c \), where \(a\), \(b\), and \(c\) are coefficients.

- **Equation a:**
  \[ y = x^2 - 4x + 7 \]

- **Equation b:**
  \[ y = x^2 - x - 2 \]

- **Equation c:**
  \[ y = x^2 + 3x \]

- **Equation d:**
  \[ y = x^2 + 7x + 10 \]

Each equation represents a parabolic curve when graphed on the coordinate plane. The coefficient \(a\) (here equal to 1 for all equations) determines the direction of the parabola (upward since \(a > 0\)). The coefficients \(b\) and \(c\) affect the position and shape of the parabola.

Understanding these quadratic equations is fundamental for analyzing various mathematical and real-world problems, such as projectile motion, optimization problems, and the study of various physical, economic, and statistical phenomena.
Transcribed Image Text:### Quadratic Equations Below are a set of quadratic equations labeled from 'a' to 'd'. These equations are of the form \( y = ax^2 + bx + c \), where \(a\), \(b\), and \(c\) are coefficients. - **Equation a:** \[ y = x^2 - 4x + 7 \] - **Equation b:** \[ y = x^2 - x - 2 \] - **Equation c:** \[ y = x^2 + 3x \] - **Equation d:** \[ y = x^2 + 7x + 10 \] Each equation represents a parabolic curve when graphed on the coordinate plane. The coefficient \(a\) (here equal to 1 for all equations) determines the direction of the parabola (upward since \(a > 0\)). The coefficients \(b\) and \(c\) affect the position and shape of the parabola. Understanding these quadratic equations is fundamental for analyzing various mathematical and real-world problems, such as projectile motion, optimization problems, and the study of various physical, economic, and statistical phenomena.
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